arg: Free float and double arrays
arg: Free float and double arrays

Compiling with -Wswitch revealed that these are not freed correctly.
They can be freed just like the other arrays of primitive types.

https://bugzilla.gnome.org/show_bug.cgi?id=772790

endlessm/gjs,endlessm/gjs,endlessm/gjs,endlessm/gjs,endlessm/gjs